A book has a mass of 50 grams and an
acceleration of 5 m/s/s. What is the
force on the book?

From second law of motion, we have,

F = ma

So, F = 50kg × 5m/s^2 = 250 kg m s^-2 = 250 N

  distance on the y-axis and time on the x-axis.

explanation:

the instantaneous velocity = change in position/time taken

the slope of the graph should give instantaneous velocity.

  slope of a graph = change in value of y -axis / change in values of x -axis

  comparing both the equations

    change in value of y -axis = change in position

  change in values of x -axis = time taken

so position values should be on the y axis and time values should be on the x axis.

distance on the y-axis and time on the x-axis.